Lens driving apparatus, camera module, and optical device

ABSTRACT

A lens driving device includes a first housing; a bobbin disposed in the first housing; an aperture disposed on the bobbin; a board disposed on the first housing; a second coil and a fourth coil disposed on the board; a second magnet disposed on the bobbin and facing the second coil; a fourth magnet disposed on the aperture and facing the fourth coil; and a fourth sensor disposed on the board and configured to sense the fourth magnet. The fourth coil is overlapped with the second coil in a first direction perpendicular to an optical axis direction.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is a Continuation of U.S. application Ser. No.16/636,970, filed on Feb. 6, 2020, which is the National Phase ofPCT/KR2018/008966, filed on Aug. 7, 2018, which claims priority under 35U.S.C. § 119(a) to Patent Application No. 10-2017-0099408, filed in theRepublic of Korea on Aug. 7, 2017, all of which are hereby expresslyincorporated by reference into the present application.

TECHNICAL FIELD

The present embodiment relates to a lens driving device, a camera moduleand an optical apparatus.

BACKGROUND ART

This section provides background information related to the presentinvention, which is not necessarily prior art.

Concomitant with generalization of wide use of various mobile terminals,and commercialization of wireless internet services, demands byconsumers related to mobile terminals are also diversified to allowvarious types of peripheral devices to be mounted on the mobileterminals.

A camera module is one of the representative items that capture asubject in a picture or a video. Recently, a camera module has surfacedhaving an auto focus function which is a function automaticallyadjusting a focus in response to a distance to an object, and having anOIS function moving or tilting a lens module to a directionperpendicular to an optical axis in order to offset vibrations(movements) generated on an image sensor by an external force.

Meantime, an aperture is a device adjusting an amount of light passingthrough a lens module by adjusting a size of a hole.

The conventional camera module suffers from disadvantages in thatstructure thereof is complicated because an auto focus function, an OIS(Optical Image Stabilization) function and an aperture driving functionare performed by separate driving members.

DETAILED DESCRIPTION OF THE INVENTION Technical Subject

The present embodiment provides a compact-structured lens driving deviceconfigured to perform an auto focus function, an OIS function and anaperture driving using a single driving member, a camera module and anoptical apparatus.

Technical Solution

A lens driving device according to an exemplary embodiment of thepresent invention comprises: a first housing; a second housing disposedat an inside of the first housing; a bobbin disposed at an inside of thesecond housing; an aperture disposed on the bobbin or disposed at thebobbin; a first coil, a second coil, a third coil, and a fourth coildisposed on the first housing; a first magnet disposed on the secondhousing and disposed opposite to the first coil; a second magnetdisposed on the bobbin and disposed opposite to the second coil; a thirdmagnet disposed on the bobbin and disposed opposite to the third coil;and a fourth magnet disposed on the aperture and disposed opposite tothe fourth coil, wherein the first coil, the second coil, the thirdcoil, and the fourth coil are disposed to be spaced apart from eachother; the first coil and the third coil are disposed opposite to eachother with the first magnet and the third magnet interposedtherebetween; and the second coil and the fourth coil are disposedopposite to each other with the second magnet and the fourth magnetinterposed therebetween.

The first housing may comprise: a first corner, a second corner, a thirdcorner and a fourth corner, each mutually spaced apart from the other; afirst connection part connecting the first corner and the second corner;a second connection part connecting the second corner and the thirdcorner; a third connection part connecting the third corner and thefourth corner; and a fourth connection part connecting the four cornerand the first corner, wherein the first coil may be disposed on thefirst connection part, the second coil may be disposed on the secondconnection part, the third coil may be disposed on the third connectionpart and the fourth coil may be disposed on the fourth connection part.

The lens driving device may further comprise a board disposed at aninside with the first coil, the second coil, the third coil and thefourth coil, wherein the board may be disposed on the first connectionpart, the second connection part, the third connection part and thefourth connection part.

The board may comprise a first board disposed on the first connectionpart and disposed at an inside with the first coil, the second boarddisposed on the second connection part and disposed at an inside withthe second coil, a third board disposed on the third connection part anddisposed at an inside with the third coil, and a fourth board disposedon the fourth connection part and disposed at an inside with the fourthcoil.

The lens driving device may further comprise one or more magneticsensors disposed at an inside of the board and spaced apart from thefirst coil, the second coil, the third coil and the fourth coil todetect at least one magnetic force of the first magnet, the secondmagnet, the third magnet and the fourth magnet.

The second housing may be moved to an optical axis direction by theelectromagnetic interaction between the first magnet and the first coil,the bobbin may be moved to a first direction perpendicular to an opticalaxis by the electromagnetic interaction between the second magnet andthe second coil, or tilted to a first direction perpendicular to anoptical axis, the bobbin may be moved to a second directionperpendicular to both an optical axis and the first direction by theelectromagnetic interaction between the third magnet and the third coil,or tilted to a second direction perpendicular to both the optical axisand the first direction, the aperture may comprise a stator comprising afirst guide and a second guide, a mover disposed on the stator anddisposed with the fourth magnet, a connecting rod rotatably connected atone side with the mover, a rotor rotatably connected to the other sideof the connecting rod and rotatably connected at a center with thestator, a first blade disposed at one side of the rotor, and a secondblade disposed at the other side of the rotor, wherein the first blademay comprise a first connection rod rotatably connected at one side toone side of the rotor, and moving along the first guide, and a firstblocking plate disposed at the other side of the first connection rodand formed with a first groove, and the second blade may comprise asecond connection rod rotatably connected at one side to the other sideof the rotor, and moving along the second guide, and a second blockingplate disposed at the other side of the second connection rod and formedwith a second groove, and wherein at least one portion of the firstgroove and the second groove may be overlapped to an optical axisdirection, and an area of a hole formed by the first groove and thesecond groove may be adjusted by the electromagnetic interaction betweenthe fourth magnet and the fourth coil.

The lens driving device may further comprise: one or more first ballbearings interposed between the first housing and the second housing; amoving member interposed between the second housing and the bobbin; oneor more second ball bearings interposed between the moving member andthe bobbin; and one or more third ball bearings interposed between thesecond housing and the moving member.

The lens driving device may further comprise a cover disposed at aninside of the first housing, the second housing, the bobbin, theaperture, the first coil, the second coil, the third coil, the fourthcoil, the first magnet, the second magnet, the third magnet and thefourth magnet.

A camera module according to an exemplary embodiment of the presentinvention may comprise: a lens driving device; a lens module disposed onthe lens driving device and comprising a plurality of lenses; a mainboard disposed underneath the lens driving device; and an image sensormounted on the main board and disposed on an optical axis of the lensmodule, wherein the lens driving device may comprise: a first housing; asecond housing disposed at an inside of the first housing; a bobbindisposed at an inside of the second housing; an aperture disposed on thebobbin or disposed at the bobbin; a first coil, a second coil, a thirdcoil, and a fourth coil disposed on the first housing; a first magnetdisposed on the second housing and disposed opposite to the first coil;a second magnet disposed on the bobbin and disposed opposite to thesecond coil; a third magnet disposed on the bobbin and disposed oppositeto the third coil; and a fourth magnet disposed on the aperture anddisposed opposite to the fourth coil, wherein the first coil, the secondcoil, the third coil, and the fourth coil are disposed to be spacedapart from each other; the first coil and the third coil are disposedopposite to each other with the first magnet and the third magnetinterposed therebetween; and the second coil and the fourth coil aredisposed opposite to each other with the second magnet and the fourthmagnet interposed therebetween.

An optical apparatus according to an exemplary embodiment of the presentinvention may comprise: a frame; a display disposed at one surface ofthe frame; and a camera module disposed at an inside of the frame to beelectrically connected with the display, wherein the camera module maycomprise: a lens module disposed on a lens driving device to comprise aplurality of lenses; a main board disposed underneath the lens drivingdevice; and an image sensor mounted on the main board and disposed on anoptical axis of the lens module, and wherein the lens driving device maycomprise: a first housing; a second housing disposed at an inside of thefirst housing; a bobbin disposed at an inside of the second housing; anaperture disposed on the bobbin or disposed at the bobbin; a first coil,a second coil, a third coil, and a fourth coil disposed on the firsthousing; a first magnet disposed on the second housing and disposedopposite to the first coil; a second magnet disposed on the bobbin anddisposed opposite to the second coil; a third magnet disposed on thebobbin and disposed opposite to the third coil; and a fourth magnetdisposed on the aperture and disposed opposite to the fourth coil,wherein the first coil, the second coil, the third coil, and the fourthcoil are disposed to be spaced apart from each other; the first coil andthe third coil are disposed opposite to each other with the first magnetand the third magnet interposed therebetween; and the second coil andthe fourth coil are disposed opposite to each other with the secondmagnet and the fourth magnet interposed therebetween.

Advantageous Effects

The lens driving device according to an exemplary embodiment can performall the auto focus function, the OIS function and the aperture drivingfunction in response to an electromagnetic interaction between a coildisposed on the first housing and magnets respectively disposed on thesecond housing, the bobbin and the aperture, to allow having a compactstructure. Furthermore, the embodiment of the present invention providesa camera module comprising the lens driving device and an opticalapparatus comprising the camera module.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a cross-sectional view conceptually illustrating a cameramodule according to an exemplary embodiment of the present invention.

FIG. 2 is an exploded perspective view conceptually illustrating acamera module according to an exemplary embodiment of the presentinvention.

FIG. 3 are views illustrating a first housing according to an exemplaryembodiment of the present invention.

FIG. 4 is a plane view conceptually illustrating a first housing, asecond housing, a bobbin, an aperture, a coil and a magnet according toan exemplary embodiment of the present invention.

FIG. 5 is a plane view conceptually illustrating an aperture accordingto an exemplary embodiment of the present invention.

BEST MODE

Some exemplary embodiments of present invention will be described indetail with reference to the accompanying drawings. In describing areference numeral for each element, a same reference numeral will bedesignated, if possible, for the same element, albeit being differentlyindicated on other drawings. Furthermore, well-known features orfunctions may be omitted or simplified in order not to obscure theembodiment being described.

In describing elements in the exemplary embodiments of the presentinvention, the terms of first, second, A, B (a), (b), etc., may be used.These terms may be used only to distinguish one element from anotherelement, and the nature, order or sequence is not restricted by theseterms. When an element is referred to as being “accessed to”, “coupledto,” or “connected to,” another element, it should be appreciated thatthe element may be directly accessed, connected or coupled to the otherelement, or intervening elements may be present therebetween.

The hereinafter-used term of “optical axis” may be defined as an opticalaxis of a lens module coupled to a lens driving device. The “opticalaxis direction” may be parallel with z axis. The hereinafter-used termof “first direction” may be defined as being perpendicular to an opticalaxis. The “first direction” may be parallel with x axis. Thehereinafter-used term of “second direction” may be defined as being allperpendicular to an optical axis direction and a first direction. The“second direction” may be defined as being perpendicular to y axis.

However, it should be noted that the “optical axis”, the “firstdirection” and the “second direction” are not limited to being mutuallyperpendicular. For example, the “optical axis” and the “first direction”may be slantly disposed at an angle other than 90°, and the “seconddirection” may be slantly disposed at an angle other than 90° for allthe “optical axis”, the “first direction”.

The hereinafter-used term of ‘auto focus function’ may be defined as afunction of matching a focus of a subject by adjusting a distance to animage sensor by moving a lens module to an optical axis directionaccording to a distance to the subject in order to allow obtaining aclear image of the subject from the image sensor. Meantime, the “autofocus function” may be interchangeably used with an “AF (Auto Focus)function”.

The hereinafter-used term of ‘handshake correction function’ may bedefined as a function of moving or tilting a lens module to a directionperpendicular to an optical axis (first direction or second direction)in order to offset a vibration (movement) on an image sensor generatedby an external force. Meantime, the ‘handshake correction function’ maybe interchangeably used with the ‘OIS (Optical Image Stabilization)’function.

Hereinafter, a configuration of an “optical apparatus” according to anexemplary embodiment of the present invention will be described. Theoptical apparatus may be any one of a hand phone, a mobile phone, asmart phone, a portable smart device, a digital camera, a notebookcomputer (laptop computer), a digital broadcasting terminal, a PDA(Personal Digital Assistant), a PMP (Portable Multimedia Player) and anavigation device. However, the present invention is not limitedthereto, and any device capable of capturing an image or a photographmay be an optical apparatus.

The “optical apparatus” according to an exemplary embodiment of thepresent invention may comprise a frame which is an external member, adisplay panel disposed at one surface of the frame to displayinformation and a camera module disposed at an inside of the frame. Thecamera module may photograph an image or a photograph and may beelectrically connected to the display panel. An image photographed bythe camera module may be reproduced by the display panel.

Now, the configuration of “camera module” according to an exemplaryembodiment of the present invention will be described with reference tothe accompanying drawings. FIG. 1 is a cross-sectional view conceptuallyillustrating a camera module according to an exemplary embodiment of thepresent invention, FIG. 2 is an exploded perspective view conceptuallyillustrating a camera module according to an exemplary embodiment of thepresent invention, FIG. 3 (a) is a perspective view conceptuallyillustrating a first housing according to an exemplary embodiment of thepresent invention, FIG. 3 (b), above, is a view of planar figure of aboard seen from inside according to an exemplary embodiment of thepresent invention, and FIG. 3 (b), below, is a view of planar figure ofa board seen from outside according to an exemplary embodiment of thepresent invention, FIG. 4 is a plane view conceptually illustrating afirst housing, a second housing, a bobbin, an aperture, a coil and amagnet according to an exemplary embodiment of the present invention andFIG. 5 is a plane view conceptually illustrating an aperture accordingto an exemplary embodiment of the present invention.

The camera module (1000) may comprise a cover (100), a first housing(200), a coil (210), a board (220), a magnetic sensor (230), a yoke(240), a second housing (300), a first ball bearing (310), a bobbin(400), a lens module (410), a moving member (500), a second ball bearing(510), a third ball bearing (520), a magnet (600), an aperture (700), abase (800), a main board (900), an image sensor (910), an IR (Infrared)cut-off filter (not shown) and a controller (not shown).

The cover (100), the first housing (200), the coil (210), the board(220), the magnetic sensor (230), the yoke (240), the second housing(300), the first ball bearing (310), the bobbin (400), the lens module(410), the moving member (500), the second ball bearing (510), the thirdball bearing (520), the magnet (600), the aperture (700) and the base(800) may be constitutional elements of a “lens driving device”.

The cover (100) may be an external member of the “camera module (1000)”and the “lens driving device”. An inside of the cover (100) may bedisposed with a first housing (200), a coil (210), a board (220), amagnetic sensor (230), a yoke (240), a second housing (300), a firstball bearing (310), a bobbin (400), a lens module (410), a moving member(500), a second ball bearing (510), a third ball bearing (520), a magnet(600), an aperture (700) and a base (800). The cover (100) may bedisposed thereunder with a main board (900) and an image sensor (910).

The cover (100) may comprise a metal material. The cover (100) mayprevent an electromagnetic wave from being introduced into from outsideor may prevent an electromagnetic wave from being discharged outsidefrom inside. Therefore, the cover (100) may be called a “shield can”.However, the material of the cover (100) is limited thereto, and thematerial of cover (100) may comprise plastic material, for example.

The cover (100) may take a square plate shape, and may centrallycomprise an upper plate formed with a hole aligned with an optical axis,and four side plates downwardly extended from each side of the upperplate. The cover (100) may be formed at an upper surface by an upperplate of the cover (100) and a side plate of the cover (100) with a holealigned with an optical axis, and may be formed with a lower-surfaceopened inner space. The hole of the upper plate at the cover (100) maybe passed through by an outside light reflected by an object.

The cover (100) may be supported by the main board (900). A lowersurface of the side plate at the cover (100) may be coupled with anupper surface of main board (900). A portion coupled by the cover (100)and the main board (900) may be coated with an adhesive. However, in amodification (not shown), the cover (100) may be supported by the base(800). In this case, the coupled relationship between the cover (100)and the base (800) may be inferably applied with a coupled relationshipbetween the cover (100) and the main board (900) of the presentexemplary embodiment.

The first housing (200) may be disposed at an inside of the cover (100).An inside of the first housing (200) may be disposed with a secondhousing (300), a first ball bearing (310), a bobbin (400), a lens module(410), a moving member (500), a second ball bearing (510), a third ballbearing (520), a magnet (600) and an aperture (700). The first housing(200) may be disposed with a coil (210), a board (220), a magneticsensor (230) and a yoke (240). The first housing (200) may be disposedthereunder with a base (800) and a main board (900).

The first housing (200) may comprise a plastic material. The firsthousing (200) may be a plastic injection. However, the material of thefirst housing (200) may not be limited thereto.

The first housing (200) may comprise: a first corner (C1), a secondcorner (C2), a third corner (C3) and a fourth corner (C4), each mutuallyspaced apart; a first connection part (201) connecting the first corner(C1) and the second corner (C2); a second connection part (202)connecting the second corner (C2) and the third corner (C3); a thirdconnection part (203) connecting the third corner (C3) and the fourthcorner (C4); and a fourth connection part (204) connecting the fourthcorner (C4) and the first corner (C1).

The first corner (C1) and the third corner (C3) may be symmetricallydisposed about an optical axis. The second corner (C2) and the fourthcorner (C4) may be spaced apart from the first corner (C1) and the thirdcorner (C3), and may be symmetrically disposed about an optical axis.The first corner (C1) may be interposed between the first connectionpart (201) and the second connection part (202). The second corner (C2)may be interposed between the second connection part (202) and the thirdconnection part (203). The third corner (C3) may be interposed betweenthe third connection part (203) and the fourth connection part (204).The fourth corner (C4) may be interposed between the fourth connectionpart (204) and the first connection part (201).

The first connection part (201) and the third connection part (203) maybe symmetrically disposed about an optical axis. The first connectionpart (201) and the third connection part (203) may be so disposed as tobe correspondent (face, overlap) to a “second direction”.

The second connection part (202) and the fourth connection part (204)may be interposed between the first connection part (201) and the thirdconnection part (203), and may be symmetrically disposed about anoptical axis. The second connection part (202) and the fourth connectionpart (204) may be so disposed as to be correspondent (face, overlap) toa “first direction”.

The first connection part (201) and the third connection part (203) maybe mutually and parallel disposed. The second connection part (202) andthe fourth connection part (204) may be mutually and parallel disposed.The first connection part (201) and the third connection part (203) maybe perpendicularly disposed with the second connection part (202) andthe fourth connection part (204).

The first connection part (201) may be disposed with a first coil (211),a first board (221), a first magnetic sensor (231) and a first yoke(241). The second connection part (202) may be disposed with a secondcoil (212), a second board (222), a second magnetic sensor (232) and asecond yoke (242). The third connection part (203) may be disposed witha third coil (213), a third board (223), a third magnetic sensor (233)and a third yoke (243). The fourth connection part (204) may be disposedwith a fourth coil (214), a fourth board (224), a fourth magnetic sensor(234) and a fourth yoke (244).

A connection part of housing (200) may be a support member performing tosupport the coil (210), the board (220), the magnetic sensor (230) andthe yoke (240).

The coil (210) may be formed in a plural number. The coil (210) may bedisposed on the first housing (200). The coil (210) may be disposed onthe board (220). The coil (210) may be electrically connected with theboard (220). Each of the plurality of coils (210) may be so disposed asto be correspondent (face, overlap) with each of the magnets (600) to a“first direction” and to a “second direction”. When a power is appliedto the coil (210), the coil (210) may electromagnetically interact withthe magnet (600). As a result, an auto focusing function, an OISfunction and driving of aperture (700) may be implemented.

The plurality of coils (210) may comprise a first coil (211), a secondcoil (212), a third coil (213) and a fourth coil (214).

The first coil (211) may be a coil block wound with a conductive wire ora pattern coil formed on a board. The first coil (211) may be disposedon the first connection part (201) of the first housing (200). The firstcoil (211) may be disposed on the first board (221). The first coil(211) may be so disposed as to be correspondent (face, overlap) with thefirst magnet (610) to a “second direction”. The first coil (211) mayelectromagnetically interact with the first magnet (610).

The second coil (212) may be a coil block wound with a conductive wireor a pattern coil formed on a board. The second coil (212) may bedisposed on the second connection part (202) of the first housing (200).The second coil (212) may be disposed on the second board (222). Thesecond coil (212) may be so disposed as to be correspondent (face,overlap) with the second magnet (620) to a “first direction”. The secondcoil (212) may electromagnetically interact with the second magnet(620).

The third coil (213) may be a coil block wound with a conductive wire ora pattern coil formed on a board. The third coil (213) may be disposedon the third connection part (203) of the first housing (200). The thirdcoil (213) may be disposed on the third board (223). The third coil(213) may be so disposed as to be correspondent (face, overlap) with thethird magnet (630) to a “second direction”. The third coil (213) mayelectromagnetically interact with the third magnet (630).

The fourth coil (214) may be a coil block wound with a conductive wireor a pattern coil formed on a board. The fourth coil (214) may bedisposed on the fourth connection part (204) of the first housing (200).The fourth coil (214) may be disposed on the fourth board (224). Thefourth coil (214) may be so disposed as to be correspondent (face,overlap) with the fourth magnet (640) to a “first direction”. The fourthcoil (214) may electromagnetically interact with the fourth magnet(640).

The first coil (211) and the third coil (213) may face each other acrossthe first magnet (610) and the third magnet (630). The second coil (212)and the fourth coil (214) may face each other across the second magnet(620) and the fourth magnet (640).

The first coil (211), the second coil (212), the third coil (213) andthe fourth coil (214) may be so similarly disposed as to be disposedalong each side of a square. Furthermore, the first coil (211) may facethe first magnet (610), the second coil (212) may face the second magnet(620), the third coil (213) may face the third magnet (630) and thefourth coil (214) may face the fourth magnet (640).

The foregoing arrangement may be advantageous to an arrangement whereeach of the plurality of coils (210) electromagnetically interact with aface magnet among the plurality of magnets (600), and at the same time,may be an arrangement minimally reducing the electromagneticinterference among adjacent magnets (600) with adjacent coils (210).Thus, the camera module (1000) according to an exemplary embodiment canperform an accurate auto focusing function, an OIS function and drivingof an aperture (700).

The board (220) may be disposed on the first housing (200). The board(220) may be disposed with a coil (210), a magnetic sensor (230) and ayoke (240). The board (220) may be electrically connected with a coil(210) and may supply a power to the coil (210). The board (220) may beelectrically connected to the magnetic sensor (230) and may receive adetection signal of the magnetic sensor (230). The board (220) may beelectrically connected to a main board (900) to receive a power andvarious control signals from the main board (900), and transmit thedetection signal of the magnetic sensor (230).

The board (220) may comprise a first board (221), a second board (222),a third board (223), a fourth board (224), a first connection board(225), a second connection board (226), a third connection board (227)and a fourth connection board (228).

The first board (221) may be a PCB (Printed Circuit Board). The firstboard (221) may be disposed on the first connection part (201) ofhousing (200). An inside surface of the first board (221) may bedisposed with a first coil (211) and a first magnetic sensor (231). Anoutside surface of the first board (221) may be disposed with a firstyoke (241).

The second board (222) may be a PCB (Printed Circuit Board). The secondboard (222) may be disposed on the second connection part (202) ofhousing (200). An inside surface of the second board (222) may bedisposed with a second coil (212) and a second magnetic sensor (232). Anoutside surface of the second board (222) may be disposed with a secondyoke (242).

The third board (223) may be a PCB (Printed Circuit Board). The thirdboard (223) may be disposed on the third connection part (203) ofhousing (200). An inside surface of the third board (223) may bedisposed with a third coil (213) and a third magnetic sensor (233). Anoutside surface of the third board (223) may be disposed with a thirdyoke (243).

The fourth board (224) may be a PCB (Printed Circuit Board). The fourthboard (224) may be disposed on the fourth connection part (204) ofhousing (200). An inside surface of the fourth board (224) may bedisposed with a fourth coil (214) and a fourth magnetic sensor (234). Anoutside surface of the fourth board (224) may be disposed with a fourthyoke (244).

The first connection board (225) may be an FPCB (Flexible PrintedCircuit Board). The first connection board (225) may electricallyconnect the first board (221) with the second board (222). In amodification (not shown), the first connection board (225) may bechanged by various conductive lines (e.g., a wire).

The second connection board (226) may be an FPCB (Flexible PrintedCircuit Board). The second connection board (226) may electricallyconnect the second board (222) with the third board (223). In amodification (not shown), the second connection board (226) may bechanged by various conductive lines (e.g., a wire).

The third connection board (227) may be an FPCB (Flexible PrintedCircuit Board). The third connection board (227) may electricallyconnect the third board (223) with the fourth board (224). In amodification (not shown), the third connection board (227) may bechanged by various conductive lines (e.g., a wire).

The fourth connection board (228) may be an FPCB (Flexible PrintedCircuit Board). The fourth connection board (228) may electricallyconnect the fourth board (224) with the first board (221). In amodification (not shown), the fourth connection board (228) may bechanged by various conductive lines (e.g., a wire).

The magnetic sensor (230) may be more than one. The magnetic sensor(230) may be disposed on the board (220). The magnetic sensor (230) maybe electrically connected to the board (220). The magnetic sensor (230)may be so disposed as to be correspondent (face, overlap) with themagnet (600). The magnetic sensor (230) may be so disposed as to becorrespondent (face, overlap) with the magnet (600) to a “firstdirection” and a “second direction”.

The one or more magnetic sensors (230) may detect at least one magneticforce of the plurality of magnets (600). The magnetic sensor (230) maydetect the magnetic force of the magnet (600) and output the detectionsignal. The main board (900) may process a magnetic signal of themagnetic sensor (230) and identify a position of the magnet (600), andan accurate auto focusing function, an OIS function and driving ofaperture (500) can be performed (feedback control) based on theforegoing process and identification.

The one or more magnetic sensors (230) may comprise a first magneticsensor (231), a second magnetic sensor (232), a third magnetic sensor(233) and a fourth magnetic sensor (234).

The first magnetic sensor (231) may be a “Hall sensor”. The firstmagnetic sensor (231) may be disposed on the first connection part (201)of the first housing (200). The first magnetic sensor (231) may bespaced apart from the first coil (211) and may be disposed on the firstboard (221). The first magnetic sensor (231) may be correspondent (face,overlap) with the first magnet (610) to a “first direction”. The firstmagnetic sensor (231) may detect a magnetic force of the first magnet(610), and may output a first detection signal in response thereto.

The second magnetic sensor (232) may be a “Hall sensor”. The secondmagnetic sensor (232) may be disposed on the second connection part(202) of the first housing (200). The second magnetic sensor (232) maybe spaced apart from the second coil (212) and may be disposed on thesecond board (222). The second magnetic sensor (232) may becorrespondent (face, overlap) with the second magnet (620) to a “firstdirection”. The second magnetic sensor (232) may detect a magnetic forceof the second magnet (620), and may output a second detection signal inresponse thereto.

The third magnetic sensor (233) may be a “Hall sensor”. The thirdmagnetic sensor (233) may be disposed on the third connection part (203)of the first housing (200). The third magnetic sensor (233) may bespaced apart from the third coil (213) and may be disposed on the thirdboard (223). The third magnetic sensor (233) may be correspondent (face,overlap) with the third magnet (630) to a “second direction”. The thirdmagnetic sensor (233) may detect a magnetic force of the third magnet(630), and may output a third detection signal in response thereto.

The fourth magnetic sensor (234) may be a “Hall sensor”. The fourthmagnetic sensor (234) may be disposed on the fourth connection part(204) of the first housing (200). The fourth magnetic sensor (234) maybe spaced apart from the fourth coil (214) and may be disposed on thefourth board (224). The fourth magnetic sensor (234) may becorrespondent (face, overlap) with the fourth magnet (640) to a “firstdirection”. The fourth magnetic sensor (234) may detect a magnetic forceof the fourth magnet (640), and may output a fourth detection signal inresponse thereto.

The yoke (240) may be formed with a plural number. The yoke (240) may bedisposed on the board (220). The yoke (240) may be so disposed as to becorrespondent (face, overlap) with the coil (210) and the magnet (600).Each of the plurality of yokes (240) may be correspondent (face,overlap) with each of the plurality of coils (210) and each of theplurality of magnets (600) to a “first direction” and a “seconddirection”. The yoke (240) may concentrate or focus the electromagneticforce of coil (210) and magnetic force of the magnet (600) to allow theelectromagnetic interaction between the coil (210) and the magnet to besmoothly performed.

The plurality of yokes (240) may comprise a first yoke (241), a secondyoke (242), a third yoke (243) and a fourth yoke (244).

The first yoke (241) may be a plated type magnetic substance. The firstyoke (241) may be disposed on the first connection part (201) of thefirst housing (200). The first yoke (241) may be disposed on the firstboard (221). The first yoke (241) may be correspondent (face, overlap)with the first coil (211) and the first magnet (610) to a “seconddirection”. The first yoke (241) may concentrate or focus theelectromagnetic force of first coil (211) and the magnetic force of thefirst magnet (610).

The second yoke (242) may be a plated type magnetic substance. Thesecond yoke (242) may be disposed on the second connection part (202) ofthe first housing (200). The second yoke (242) may be disposed on thesecond board (222). The second yoke (242) may be correspondent (face,overlap) with the second coil (212) and the second magnet (620) to a“first direction”. The second yoke (242) may concentrate or focus theelectromagnetic force of second coil (212) and the magnetic force of thesecond magnet (620).

The third yoke (243) may be a plated type magnetic substance. The thirdyoke (243) may be disposed on the third connection part (203) of thefirst housing (200). The third yoke (243) may be disposed on the thirdboard (223). The third yoke (243) may be correspondent (face, overlap)with the third coil (213) and the third magnet (630) to a “seconddirection”. The third yoke (243) may concentrate or focus theelectromagnetic force of third coil (213) and the magnetic force of thethird magnet (630).

The fourth yoke (244) may be a plated type magnetic substance. Thefourth yoke (244) may be disposed on the fourth connection part (204) ofthe first housing (200). The fourth yoke (244) may be disposed on thefourth board (224). The fourth yoke (244) may be correspondent (face,overlap) with the fourth coil (214) and the first magnet (640) to a“first direction”. The fourth yoke (244) may concentrate or focus theelectromagnetic force of fourth coil (214) and the magnetic force of thefourth magnet (640).

The second housing (300) may be disposed at an inside of the firsthousing (200). The inside of the second housing (300) may be disposedwith a bobbin (400), a lens module (410), a moving member (500), asecond ball bearing (510), a third ball bearing (520), a magnet (600)and an aperture (700). The second housing (300) may be disposedthereunder with a base (800) and a board (900).

The second housing (300) may take a square plate shape, and may becentrally formed with a lower plate formed with a hole aligned with anoptical axis, and four side plates upwardly extended from each side ofthe lower plate. The second housing (300) may be formed at a lowersurface with a hole aligned with an optical axis by the lower plate ofthe second housing (300) and the side plates of the second housing(300), and may be formed with an upper surface-opened inner space. Thehole of the lower plate at the second housing (300) may be passedthrough by a light having passed through the lens module (410).

A plurality of first ball bearings (310) may be disposed between thesecond housing (300) and the first housing (200). The second housing(300) may be moved by the first ball bearing (310) to an “optical axisdirection”. That is, the second housing (300) may be movably connectedwith the first housing (200) to the “optical axis direction”.

The second housing (300) may be disposed with a first magnet (610). Aside plate correspondently (facingly, overlappingly) disposed with thefirst connection part (201) to the “second direction” among the sideplates of the second housing (300) may be disposed with a first magnet(610). When a power is applied to the first coil (211) to allow thefirst coil (211) and the first magnet (610) to electromagneticallyinteract, the second housing (300) may be generated with a driving forceto move to an “optical axis direction”.

When the second housing (300) is moved to the “optical axis direction”,the lens module (410) may be moved to the “optical axis direction” alongwith the second housing (300). The AF (Auto Focus) function may beimplemented through this process.

The second housing (300) may comprise a plastic material. The secondhousing (300) may be a plastic injection. However, the material of thesecond housing (300) is not limited thereto.

The bobbin (400) may be disposed at an inside of the second housing(300). An inside of the bobbin (400) may be disposed with a lens module(410). The aperture (500) may be disposed inside of or above the bobbin(400). The bobbin (400) may be dispose thereunder with a moving member(500), a second ball bearing (510) and a third ball bearing (520).

The bobbin (400) may take a hollowed shape formed with a hole alignedwith an optical axis. The hole of the bobbin (400) may be passed througha light having passed the hole at the upper plate of cover (100). Aplurality of second ball bearings (510) may be interposed between thebobbin (400) and the moving member (500). The bobbin (400) may be movedby the second ball bearing (510) to the “first direction”, or may betilted to the “first direction”. That is, the bobbin (400) may be soconnected to the moving member (500) as to allow being moved to the“first direction” or being tilted to the “first direction”.

The bobbin (400) may be disposed with the second magnet (620) and thethird magnet (630). A side surface correspondently (facingly,overlappingly) disposed with the second connection part (202) of thehousing (200) from the bobbin (400) to the “first direction” may bedisposed with a second magnet (620). A side surface correspondently(facingly, overlappingly) disposed with the third connection part (203)of the housing (200) from the bobbin (400) to the “second direction” maybe disposed with a third magnet (630).

When a power is applied to the second coil (212) to allow the secondcoil (212) and the second magnet (620) to electromagnetically interact,a driving force moving the bobbin (400) to the “first direction” ortilting the bobbin (400) to the “first direction” may be generated.

When a power is applied to the third coil (213) to allow the third coil(213) and the third magnet (630) to electromagnetically interact, adriving force moving the bobbin (400) to the “second direction” ortilting the bobbin (400) to the “second direction” may be generated.

When the bobbin (400) is moved or tilted to the “first direction”, thelens module (410) may be moved or tilted to the “first direction” alongwith the bobbin (400). Through this process, an OIS function {OIS(x)}based on the “first direction (x axis)” may be implemented.

When the bobbin (400) is moved or tilted to the “second direction”, thelens module (410) may be moved or tilted to the “second direction” alongwith the bobbin (400). Through this process, an OIS function {OIS(y)}based on the “second direction (y axis)” may be implemented.

The bobbin (400) may comprise a plastic material. The bobbin (400) maybe a plastic injection. However, the material of the bobbin (400) is notlimited thereto.

The lens module (410) may be disposed at an inside of bobbin (400). Thelens module (410) may comprise a plurality of lenses and a lens barrel.However, one element of lens module (410) is not limited to the lensbarrel, and any holder structure capable of supporting one or morelenses may be sufficient. A light having passed the lens module may beirradiated on the image sensor (910).

The moving member (500) may be disposed underneath the bobbin (400). Themoving member (500) may be disposed above a lower plate of secondhousing. The moving member (500) may be interposed between the secondhousing (300) and the bobbin (400).

The moving member (500) may take a square plate shape centrally formedwith a hole aligned with an optical axis. The hole of the moving member(500) may be passed through by a light having passed the hole of thebobbin (400).

The moving member (500) may comprise a plastic material. The movingmember (500) may be a plastic injection. However, the material of themoving member (500) is not limited thereto.

A plurality of second ball bearings (510) may be interposed between themoving member (500) and the bobbin (400). The bobbin (400) may be movedor tilted by the second ball bearing (510) to the “first direction”.That is, the bobbin (400) may be moveably or tiltably connected with themoving member (500) to the “first direction”.

A plurality of third ball bearings (520) may be interposed between themoving member (500) and the second housing (300). The moving member(500) may be moved or tilted by the third ball bearing (520) to the“second direction”. That is, the moving member (500) may be moveably ortiltably connected with the second housing (300) to the “seconddirection”. The bobbin (400) may be moved or tilted by the moving member(500) to the “second direction”.

The magnet (600) may be formed with a plural number. Each of theplurality of magnets (600) may be distributed and disposed on the secondhousing (300), the bobbin (400) and the aperture (700). Each of theplurality of magnets (600) may be correspondently (facingly,overlappingly) disposed with each of the plurality of coils (210) to the“first direction” or to the “second direction”.

The magnet (600) may electromagnetically interact with the coil (210) toprovide a driving force to the second housing (300) and the bobbin(400). The second housing (300) may be moved by the electromagneticinteraction between the magnet (600) and the coil (210) to the “opticalaxis direction” to perform the AF function. The bobbin (400) may bemoved or tilted by the electromagnetic interaction between the magnet(600) and the coil (210) to the “first direction (x axis)” to perform anOIS function based on the “first direction (x axis)”.

The bobbin (400) may be moved or tilted by the electromagneticinteraction between the magnet (600) and the coil (210) to the “seconddirection (y axis)” to perform an OIS function {(OIS (y)} based on the“second direction (y axis)”.

The plurality of magnets (600) may comprise a first magnet (610), asecond magnet (620), a third magnet (630) and a fourth magnet (600).

The first magnet (610) and the third magnet (630) may be symmetricallydisposed about an “optical axis”. The first magnet (610) and the thirdmagnet (630) may be disposed parallel about the “first direction”. Thefirst magnet (610) and the third magnet (630) may be correspondently(facingly, overlappingly) disposed at a mutual inner surface to the“second direction”.

The second magnet (620) and the fourth magnet (640) may be spaced apartfrom the first magnet (610) and the third magnet (630).

The second magnet (620) and the fourth magnet (640) may be symmetricallydisposed about an “optical axis”. The second magnet (620) and the fourthmagnet (640) may be disposed parallel about the “second direction”. Thesecond magnet (620) and the fourth magnet (640) may be correspondently(facingly, overlappingly) disposed at a mutual inner surface to the“first direction”.

The first magnet (610) may be correspondently (facingly, overlappingly)disposed with the first coil (211) to the “second direction”. The firstmagnet (610) may take a plated magnet shape correspondently (facingly,overlappingly) disposed at an outside surface with an inner surface ofan inner surface to “second direction”.

The first magnet (610) may electromagnetically interact with the firstcoil (211) to perform an AF (Auto Focus) function. The first magnet(610) may be formed on a side plate correspondently (facingly,overlappingly) disposed with the first connection part (201) among theside plates of the second housing (300) to the “second direction”.

The second magnet (620) may be correspondingly (facingly, overlappingly)disposed with the second coil (212) to the “first direction”. The secondmagnet (620) may take a plated magnet shape correspondingly disposed atan outside surface with an inner surface of the first coil (211) to the“first direction”.

The second magnet (620) may electromagnetically interact with the secondcoil (212) to perform an OIS {OIS(x)} based on the “first direction (xaxis)”. The second magnet (620) may be disposed at a side surfacecorrespondently (facingly, overlappingly) disposed with the secondconnection part (202) among the side surfaces of the bobbin (400) to the“first direction”.

The third magnet (630) may be correspondingly (facingly, overlappingly)disposed with the third coil (213) to the “second direction”. The thirdmagnet (630) may be a plated magnet correspondingly (facingly,overlappingly) disposed at an outside surface with an inner side surfaceof the third coil (213).

The third magnet (630) may electromagnetically interact with the thirdcoil (213) to perform an OIS {OIS (y)} based on the “second direction”.The third magnet (630) may be formed on a side surface correspondingly(facingly, overlappingly) disposed with the third connection part (203)among the side surfaces of bobbin (400) to the “second direction”.

The fourth magnet (640) may be correspondingly (facingly, overlappingly)disposed with the fourth coil (214) to the “first direction”. The fourthmagnet (640) may be a plated magnet correspondently (facingly,overlappingly) disposed at an outside surface with an inner surface ofthe fourth coil (214) to the “second direction”. The fourth magnet (640)may perform the driving of aperture (700) by electromagneticallyinteracting with the fourth coil (214).

The aperture (700) may be disposed on or at the bobbin (400). When theaperture (700) is disposed at the bobbin (400)(not shown), the aperture3(700) may be disposed among the plurality of lenses of the lens module(410). The aperture (700) may be disposed with the fourth magnet (640).

The aperture (700) may comprise a stator (710) comprising a first guide(711) and a second guide (712), a mover (720) disposed on the stator(710) and disposed with the fourth magnet (640), a connecting rod (730)rotatably connected at one side to the mover (720), a rotor (740)rotatably connected to the other side of the connecting rod (730) androtatably connected at a center with the stator (710), a first blade(750) disposed at one side of the rotor (740), and a second blade (760)disposed at the other side of the rotor (740).

The mover (720) may be moved to the “first direction” in response to theelectromagnetic interaction between the fourth coil (214) and the fourthmagnet (640). In order to facilitate the movement of the mover (720), aplurality of fourth ball bearings (not shown) may be interposed betweenthe stator (710) and the mover (720).

The driving force may be transmitted to the rotor (740) through theconnecting rod (730) by the movement of mover (720) to the “firstdirection”. The rotor (740) may be rotated to the forward direction orto the backward direction, and the first blade (750) and the secondblade (760) may be moved to the “second direction” by the rotation ofthe rotor (740).

The first blade (750) may comprise a first connecting rod (751)rotatably connected at one side to one side of the rotor (740) andmoving along the first guide (711), and a first blocking plate (752)disposed at the other side of the first connecting rod (751) and formedwith a first groove (752-1).

The second blade (760) may comprise a second connecting rod (762)rotatably connected at one side to the other side of the rotor (740) andmoving along the second guide (712), and a second blocking plate (762)disposed at the other side of the second connecting rod (762) and formedwith a second groove (762-1).

At least one portion of the first groove (752-1) and the second groove(762-1) may be overlapped to the optical axis direction, and the firstgroove (752-1) and the second groove (762-1) may form a hole (770). Anarea of hole (770) formed by the first groove (752-1) and the secondgroove (762-1) may be adjusted by allowing the first blade (750) and thesecond blade (750) to be moved to the “second direction”. That is, thearea of hole (770) formed by the first groove (752-1) and the secondgroove (762-1) may be adjusted by electromagnetic interaction betweenthe fourth coil (214) and the fourth magnet (640).

The aperture (700) may adjust an amount of light irradiated on the imagesensor (910).

The base (800) may be disposed on the main board (900). The base (800)may be disposed underneath the first housing (200), the second housing(300), the bobbin (400) and the moving member (500). An upper surface ofbase (800) may be brought into contact with a lower surface of firsthousing (200) and a lower surface of lower plate of the second housing(300). That is, the base (800) may be a member supporting and fixing thefirst housing (200), the second housing (300), the bobbin (400) and themoving member (500).

The base (800) may take a square plate shape centrally formed with ahole to an optical axis direction. The hole of the base (800) may bepassed by a light having passed the lens module (410) and the hole (770)of aperture (700). The light having passed the hole of base (800) may beirradiated on the image sensor (910).

The main board (900) may be a PCB (Printed Circuit Board). The mainboard (900) may be disposed underneath the cover (100), the firsthousing (200), the coil (210), the board (220), the magnetic sensor(230), the yoke (240), the second housing (300), the first ball bearing(310), the bobbin (400), the lens module (410), the moving member (500),the second ball bearing (510), the third ball bearing (520), the magnet(600), the aperture (700) and the base (800).

The main board (900) may be disposed with an image sensor (910) by beingaligned with an optical axis. The main board (900) may be mounted withan image sensor (910). For instance, an inner upper surface of mainboard (900) may be disposed with the image sensor (910), and an outerupper surface of main board (900) may be disposed with the cover (100)and the base (800). Through this structure, a light having passed thelens module (410), the hole (770) of aperture and the hole of the base(800) may be irradiated on the image sensor. The main board (900) maysupply a power to the camera module (1000) (e.g., supply of power to thecoil). The main board (900) may be mounted with a controller in order tocontrol the camera module (1000).

The image sensor (910) may output the irradiated light as an imagesignal. The image signal outputted by the image sensor may betransmitted to a display part (display panel) of an optical apparatusthrough main board (910). The image sensor (910) may be a CCD (chargecoupled device), a MOS (metal oxide semi-conductor), a CPD and a CID.However, the kinds of image sensor (910) are not limited thereto.

An IR cut-off filter may cut off a light of infrared region from beingincident on the image sensor (910). The IR cut-off filter may beinterposed between the lens module (410) and the image sensor (910), forexample. The IR cut-off filter may be disposed on a holder member (notshown) separately formed away from the base (800). However, the IRcut-off filter may be mounted on a hole formed at a central part of thebase (800). The IR cut-off filter may be formed with a film material ora glass material, for example. The IR cut-off filter may be formed byallowing an IR cut-off coating material to be coated on a plate shapedoptical filter such as cover glass for protecting a surface of imagepickup device and cover glass, for example.

The controller may be mounted on the main board (900). However, theposition of the controller is not limited thereto. The controller may bedisposed at an outside of camera module (1000). The controller maycontrol the direction, intensity and amplitude of current supplied toeach element forming the camera module (1000). The controller maycontrol the camera module (1000) to perform the AF function, the OISfunction and the driving of aperture (700).

Although the present disclosure has been explained with all constituentelements forming the exemplary embodiments of the present disclosurebeing combined in one embodiment, or being operated in one embodiment,the present disclosure is not limited thereto. That is, all elements mayoperate by allowing one or more elements to be selectively combined aslong as within the scope of object of the invention. Furthermore, termssuch as “comprises”, “comprising”, “have”, “having”, “comprises” and/or“comprising” as used herein mean that the relevant elements areembedded, unless otherwise described, such that the mentioned elementsare not excluded but may be further comprised.

Unless otherwise defined, all terms comprising technical and scientificterms used herein have the same meaning as commonly understood by one ofordinary skill in the art to which this invention belongs. It will befurther understood that terms, such as those defined in commonly useddictionaries, should be interpreted as having a meaning that isconsistent with their meaning in the context of the relevant art and thepresent disclosure, and will not be interpreted in an idealized oroverly formal sense unless expressly so defined herein. The foregoingexplanations are intended only to be illustrative of the technical ideasof the present invention, and therefore, it should be appreciated by theskilled in the art that various modifications and amendments to theabove examples may be made without deviating from the scope ofprotection of the invention.

The exemplary embodiments disclosed by the present invention are not tolimit the technical ideas of the present invention but to explain thepresent invention, and therefore, the technical ideas of presentinvention are not to be limited by the exemplary embodiments. The scopeof protection of the present invention should be interpreted by thefollowing claims and all technical ideas within the equivalent scopeshould be interpreted as being comprised in the scope of right of thepresent invention.

1. A lens driving device, comprising: a first housing; a bobbin disposedin the first housing; an aperture disposed on the bobbin; a boarddisposed on the first housing; a second coil and a fourth coil disposedon the board; a second magnet disposed on the bobbin and facing thesecond coil; a fourth magnet disposed on the aperture and facing thefourth coil; and a fourth sensor disposed on the board and configured tosense the fourth magnet, wherein the fourth coil is overlapped with thesecond coil in a first direction perpendicular to an optical axisdirection.
 2. The lens driving device of claim 1, comprising a coverdisposed on the first housing, wherein the cover comprises an upperplate and a plurality of side plates, wherein the plurality of sideplates of the cover comprises first and third side plates opposite toeach other, and second and fourth side plates opposite to each other,and wherein the fourth coil is disposed between the fourth magnet andthe fourth side plate of the cover.
 3. The lens driving device of claim2, wherein the second coil is disposed between the second magnet and thesecond side plate of the cover.
 4. The lens driving device of claim 1,wherein the second coil, the second magnet, the fourth magnet and thefourth coil are overlapped with each other in the first direction. 5.The lens driving device of claim 1, wherein the fourth sensor isdisposed in the fourth coil.
 6. The lens driving device of claim 1,comprising a second sensor disposed on the board and configured to sensethe second magnet.
 7. The lens driving device of claim 6, wherein thefourth sensor is overlapped with the second sensor in the firstdirection.
 8. The lens driving device of claim 1, comprising: a secondhousing disposed between the first housing and the bobbin; a first coiland a third coil disposed on the board; a first magnet disposed on thesecond housing and facing the first coil; and a third magnet disposed onthe bobbin and facing the third coil.
 9. The lens driving device ofclaim 8, wherein the first to fourth coils are spaced apart from eachother, the first coil and the third coil are disposed opposite to eachother, and the second coil and the fourth coil are disposed opposite toeach other, wherein the second housing is configured to move in anoptical axis direction by the first magnet and the first coil, whereinthe bobbin is configured to move in the first direction perpendicular tothe optical axis direction by the second magnet and the second coil,wherein the bobbin is configured to move in a second directionperpendicular to both the optical axis direction and the first directionby the third magnet and the third coil, wherein the aperture comprises afirst blade and a second blade, and wherein an area of a hole defined bythe first blade and the second blade is configured to be adjusted by thefourth magnet and the fourth coil.
 10. The lens driving device of claim8, wherein the board comprises first to fourth boards, and a connectionboard connecting the first to fourth boards, wherein the first coil isdisposed on the first board, wherein the second coil is disposed on thesecond board, wherein the third coil is disposed on the third board, andwherein the fourth coil is disposed on the fourth board.
 11. The lensdriving device of claim 8, comprising: a first sensor disposed on theboard and configured to sense the first magnet; and a third sensordisposed on the board and configured to sense the third magnet.
 12. Thelens driving device of claim 8, wherein the first housing comprises: afirst corner, a second corner, a third corner and a fourth corner, eachmutually spaced apart from the other; a first connection part connectingthe first corner and the second corner; a second connection partconnecting the second corner and the third corner; a third connectionpart connecting the third corner and the fourth corner; and a fourthconnection part connecting the four corner and the first corner, whereinthe first coil is disposed on the first connection part, the second coilis disposed on the second connection part, the third coil is disposed onthe third connection part and the fourth coil is disposed on the fourthconnection part.
 13. The lens driving device of claim 9, wherein theaperture comprises a stator comprising a first guide and a second guide,a mover disposed on the stator and disposed with the fourth magnet, aconnecting rod rotatably connected at one side with the mover, and arotor rotatably connected to the other side of the connecting rod androtatably connected at a center with the stator, wherein the first bladeis disposed at one side of the rotor, and wherein the second blade isdisposed at the other side of the rotor.
 14. The lens driving device ofclaim 13, wherein the first blade comprises a first connection rodrotatably connected at one side to one side of the rotor and movingalong the first guide, and a first blocking plate disposed at the otherside of the first connection rod and formed with a first groove, whereinthe second blade comprises a second connection rod rotatably connectedat one side to the other side of the rotor, and moving along the secondguide, and a second blocking plate disposed at the other side of thesecond connection rod and formed with a second groove, and wherein thefirst groove and at least one portion of the second groove areoverlapped to an optical axis direction.
 15. The lens driving device ofclaim 14, wherein the hole defined by the first blade and the secondblade is a hole formed by the first groove and the second groove. 16.The lens driving device of claim 1, comprising: a moving member disposedbetween the second housing and the bobbin; one or more first ballbearings disposed between the first housing and the second housing; oneor more second ball bearings disposed between the moving member and thebobbin; and one or more third ball bearings disposed between the secondhousing and the moving member.
 17. A camera module comprising: a printedcircuit board (PCB); an image sensor disposed on the PCB; the lensdriving device of claim 1 disposed above the PCB; and a lens coupled tothe bobbin of the lens driving device.
 18. An optical apparatuscomprising: a frame; a display disposed on one surface of the frame; andthe camera module of claim 17 disposed on the frame and electricallyconnected with the display.
 19. A lens driving device, comprising: afirst housing; a cover disposed on the first housing; a bobbin disposedin the first housing; an aperture disposed on the bobbin; a boarddisposed on the first housing; a second coil and a fourth coil disposedon the board; a second magnet disposed on the bobbin and facing thesecond coil; a fourth magnet disposed on the aperture and facing thefourth coil; and a fourth sensor disposed on the board and configured tosense the fourth magnet, wherein the cover comprises an upper plate anda plurality of side plates, wherein the plurality of side plates of thecover comprises first and third side plates opposite to each other, andsecond and fourth side plates opposite to each other, and wherein thefourth coil is disposed between the fourth magnet and the fourth sideplate of the cover.
 20. A lens driving device, comprising: a firsthousing; a bobbin disposed in the first housing; a board disposed on thefirst housing; a coil disposed on the board; and a magnet disposed onthe bobbin.